Gravity Forms Quiz code

gistfile1.txt

// http://www.gravityhelp.com/forums/topic/mathematics-to-gravity-forms
add_action('gform_pre_submission', 'ch_total_quiz_values');
function ch_total_quiz_values ($form) {
	// change the number 20 here to your form ID
	// if this is not form 20, don't do any processing
	if($form['id'] != 3) 
		return $form;

	// otherwise ...
	$score = 0;
	// my inputs are numbered 1 to 18.  Change the beginning 
	// and ending number in this loop to match your actual input numbers
	for($i=1; $i<=18; $i++) {
		// add the value of the $_POST value for input 1 to input 18
		$input  = 'input_' . $i;
		$score += rgpost($input);
	}
	// update the hidden 'Score' field with our calculated score
	$_POST['input_19'] = $score;
	switch($score) {
		// my "admin only" Rating field to hold the display message based on the score is input_24
		case 0:
		case 1:
		case 2:
		case 3:
		case 4:
		case 5:
		case 6:
		case 7:
		case 8: 
			$_POST['input_20'] = '1-8: Tourist';
			break;
		case 9:
		case 10:
		case 11:
		case 12:
		case 13:
		case 14:
			$_POST['input_20'] = '9-14: Poser';
			break;
		case 15:
		case 16:
		case 17:
		case 18: 
		case 19:
		case 20:
		case 21:
		case 22:
		case 23:
		case 24:
		case 25:
			$_POST['input_20'] = '15-25: Transplant';
			break;
		case 26:
		case 27:
		case 28: 
		case 29:
		case 30:
		case 31:
			$_POST['input_20'] = '26-31: Local';
			break;
		default:
			$_POST['input_20'] = '32-33: Native';
	}
	return $form;
}